Synophropsis lauri
In 3 days ~10% in a week ~20%
Synophropsis lauri, sometimes called the bay leafhopper, is a species of leafhopper of the subfamily Deltocephalinae, tribe Fieberiellini. It is the only species in the monotypic genus Synophropsis. The hemelytra vary from greyish to brick-red (some sources say the males are grey, females red) and are somewhat translucent with the veins showing up as whitish. The wings darken towards the tips. There are small dark marks along the suture and at the distal ends of some of the long veins. The head is yellowish and the vertex is sharply pointed. Antennae are filamentous and very long. Size: up to 6.5mm long, or even 7mm.
Nymphs are green, and over-winter. The species is normally said to be univoltine, but it is possible that the females hibernate and produce a second generation. The species was first described, as Thamnotettix lauri, by Géza Horváth in 1897 from specimens taken in Fiume (Rijeka) and Buccari (Bakar) on the Adriatic coast of what is now Croatia. Nearly 30 years later, Hermann Haupt independently described a single male taken in Gravosa (Gruž), some 260 miles (420 km) further southeast. Haupt placed it in a new genus as Synophropsis... Wikipedia →
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More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report a Bay Leafhopper sighting in London on a given day, based on 24 verified sightings from GBIF citizen-science data. It is the 688th most-seen of the 1504 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 20%, if each day is a fresh chance.
February and September–October
In those months about 10% of wildlife watchers report a Bay Leafhopper in London on a given day, against under 5% in March–August and November–January, the lowest months.
4th of 9
Of the 9 cities where we can rate Bay Leafhopper sightings, London ranks 4th at under 5%. The best odds are in Madrid (Spain, about 10%), Berlin (Germany, about 10%) and Istanbul (Turkey, about 10%).
Same family: Cicadellidae
The closest relatives of the Bay Leafhopper that you can see in London (family Cicadellidae, Typical Leafhoppers) are Zygina lunaris (about 10%), Horned Leafhopper (about 10%) and Japanese Leafhopper (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Bay Leafhopper is recorded against all the insects logged in London (24 verified sightings), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
